Automatic gas-valve.



8.1. CHISM.

AUTOMATIC GAS VALVE.

APPLICATION FILED MAY3.196

1,207,135. Patented Dec. 5,1916.

UNITED STATES PATENT OFFICE.

SYLVESTER J. CHISM, 0F KRUM, TEXAS, ASSIGNOR OF ONE-HALF TO LAWSON M.HAYES,

OF SLIDELL, TEXAS.

AUTOMATIC GAS-VALVE.

Application filed May 3, 1916.

To all whom it may concern:

Be it known that I, SYLVESTER J. CHIsM, a citizen of the United Statesof America, residing at Krum, in the county of Denton and State ofTexas, have invented certain new and useful Improvements in AutomaticGas-Valves, of which the following is a specification, reference beinghad therein to the accompanying drawing.

This invention relates to an automatic gas valve, and has for its objectthe production of a simple and eflicient valve which will automaticallyclose should the pressure of the gas fall below a predetermined point.

Another object of this invention is the production of a simple andefficient means for holding the valve open while the pressure of the gasremains at a certain point and allowing the same to automatically closeand prevent the further passage of gas'through the valve into the meterafter the same has fallen below a predetermined point.

With these and other objects in view this invention consists of certainnovel combinations, constructions, and arrangements of parts as will behereinafter fully described and claimed.

In the accompanying drawings, Figure 1 is a vertical longitudinalsection through the valve showing the same in a closed position. Fig. 2is a longitudinal section through the valve showing the same in an openposition. Fig. 3 is a vertical transverse section taken on line 33, ofFig. 2. Fig. 4 is a section taken on line 44, of Fig. 2. Fig. 5 is aside elevation of thesliding valve which is adapted to automatically cutoff the flow of gas through the casing.

By referring to the drawings it will be seen that 1 designates the valvecasing which is provided with an entrance end 2 and a discharge end 3.The entrance end 2 is adapted to be connected to the supply line and thedischarge end 3 is adapted to be connected to the meter. The casing 1 isprovided with a depending section or housing 4, which housing 4 isprovided with a threaded cap 5 for closing the lower end of the housing4. This cap 5 is provided with an annular flange 6 upon the inner facethereof which is adapted to firmly engage the inner face of the housing4 and also constitute a seat for the pressure control valve 7.

The pressure control Valve 7 comprises an Specification of LettersPatent.

Patented Dec. 5, 1916.

Serial No. 95,178.

upper section having a reduced end S which is externally threaded, uponwhich externally threaded end is threaded a closure cap 5. A washer orsealing ring 10 is firmly held between the inner end of the cap 5 andthe shoulder 11 formed upon the lower end of the upper section of thecontrol valve.

A pin 12' is carried by the control valve 7 and is connected to avertically extending rod 13, which vertically extending rod 13 is inturn pivotally connected to the spring bar 14. This spring bar 14 isconnected to the top of thecasing 1 by means of the rivets 15 asillustrated clearly in Fig. 2. A coil spring 16 is mounted within thecap 5 and is adapted to normally urge the valve 7 in an upwarddirection. An air escape aperture 9 is formed in the cap 5 so as topermit the escape of air as the valve 7 is moved down within the housingor casing 4.

A cut-ofl valve 17 is slidably mounted within the casing 1 and comprisesa cylindrical body having a plurality of radiating guiding shoes 18formed upon the outer periphery thereof. These guiding shoes 18 areadapted to travel upon the inner face of the casing 1 as illustrated inFig. 2 of the drawing. A valve seat 19 is formed within the casing 1 andis adapted to receive the beveled face 20 of the valve 17 to constitutean efficient closure to prevent the pan sage of gas through the casing 1while the valve 17 is in a closed position.

A shaft 21 is ournaled near the discharge end 3 of the casing 1 and hasone end journaled in the bearing cap 22 as illustrated in Fig. 3 of thedrawings, and the outer end of this shaft 21 passes through a bushing 23for constituting an efiicient seal for preventing the escapement of gasaround the shaft 21.

An arm 24 is fitted over the squared end. 25 of the shaft 21 and isfirmly held in engagement therewith by means of the nut 26. A weight 27is slidably mounted upon the arm 24 and is held in an adjusted positionupon the arm 24 by means of a set screw 28. The shaft 21 is providedwith a projecting finger 29, which projecting finger 29 engages a link30, which link is also pivotally secured to the cars 31 of the slidingvalve 17. A catch finger 32 is carried by the inner end of the valve 17and is provided with an upwardly extending lip 33 for engaging thedepending lip 34 of the spring arm 14. The operation of the device is asfollows: The

arm 24; is swung to the position as shown in Figs. 1 and 2 so as toplace the arm 32 of the valve 17 in a position to be engaged by the arm1%. The pressure of the gas, of course, will remain at suflicientstrength to keep the valve 7 at its proper position and retain the valve17 in the position shown in Fig. 2. Should the gas fall below apredetermined pressure, the spring 16 together with the arm 14 willcause the arm let to be released from the arm 32 of the valve 17, andthe weight 27 upon the arm 24 will cause the arm 2% to swing downwardlythereby drawing the'valve 17 securely upon its seat and prevent thefurther passage of gas through the casing 1. Should it, however, bedesired to again open the supply, the arm 24 may again be swung to theposition shown in Fig. 2, and providing the pressure is sufficientlygreat, the valve will be automatically retained in anopen position untilthe pressure should again fall.

It should be understood that the present device is especiallyadvantageous for use in connection with gas stoves or lights which it isdesirous of leaving burning, for should the pressure of the gas fail tofall below a predetermined point, the valve will automatically close andprevent the escape of gas should the flames become extinguished due tothe falling of the pressure of the gas.

Having thus described the invention what is claimed as new, is

1. A gas valve of the class described comprising a casing, said casingprovided with a reduced valve seat, a valve slidably mounted within saidcasing comprising a substan tially circular body having laterallyextending shoe portions adapted to slide upon the inner face of saidcasing and at the same time permit the passage of gas around said valve,said valve provided with a tapering forward end, said Valve seatprovided with a tapering portion upon which said tapering end of saidvalve is adapted to closely seat,

Copies of this patent may be obtained for five cents each, by addressingmeans for holding said valve in an open position, a weighted arm, a linkconnected to said arm and to the forward end of said valve at thecentral portion thereof and adapted to pull said valve forwardly intoclose engagement with said valve seat when the pressure of gas withinsaid casing falls below a pre-determined pressure.

2. A gas valve of the class described comprising a casing, a valve seat,a valve member provided with radiating shoes upon the periphery thereof,said radiating shoes adapted to slide upon the inner face of said casingfor directing said valve upon said valve seat, means engaging said valvefor holding said Valve in an open position and being controlled by thepressure of the gas passing through said casing, a weighted arm carriedby said casing, a link connected to said weighted arm and to the centralforward portion of said valve for exerting a direct forward pull uponsaid valve when said valve is released and the pressure within saidcasing falls below a predetermined point.

3. A gas controlled mechanism of the class described comprising acasing, a valve seat carried within said casing, a valve slidablymounted within said casing, said valve provided with a rearwardlyextending arm, a spring arm engaging said rearwardly extending arm ofsaid valve, said casing provided with a depending portion, a capthreaded upon said depending portion, a plunger working in saiddepending portion and engaging said spring arm, means for yieldinglyurging said plunger upwardly and causing said spring arm to engage saidarm carried by said valve, and means cooperating with said valve forautomatically bringing said valve to a closed position when said springarm is released therefrom.

In testimony whereof I hereunto afliX my signature.

SYLVESTER J. OHISM.

the Commissioner of Patents,

Washington, D. C.

